import Vue from 'vue'
import VueRouter from 'vue-router'
import Login from '../components/Login.vue'
import Home from '../components/Home.vue'
import Welcome from '../components/Welcome.vue'
import Users from '../components/user/Users.vue'
import Rights from '../components/power/Rights.vue'
import Roles from '../components/power/Roles.vue'

Vue.use(VueRouter)

/* const routes = [
 {
  path:'/login',
  component:Login
 }
]

const router = new VueRouter({
  routes
}) */

const router = new VueRouter({
  routes: [
    {
      path: '/',
      redirect: '/login'
    }, {
      path: '/login',
      component: Login
    }, {
      path: '/home',
      component: Home,
      redirect: '/welcome',
      children: [
        {
          path: '/welcome',
          component: Welcome
        }, {
          path: '/users',
          component: Users
        }, {
          path: '/rights',
          component: Rights
        }, {
          path: '/roles',
          component: Roles
        },
      ]
    },
  ]
})

// 挂载路由导航守卫
router.beforeEach((to, from, next) => {
  // to  将要访问的路径
  // from  代表从哪个路径跳转而来
  // next  是一个函数  表示放行
  // next()   放行   next('/login')  强制跳转
  // console.log(from.path);
  if (to.path === '/login') 
    return next();
  


  // 获取token
  const tokenStr = window.sessionStorage.getItem('token');
  if (! tokenStr) 
    return next('/login')


  


  next();
})

export default router
